Hierarchical MVC: What, Why & How

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1. Hierarchical MVC What, Why, and How Vance Lucas (@vlucas) Friday, March 2, 2012
2. Who am I? • Vance Lucas • http://vancelucas.com • @vlucas • Business: http://brightb.it • Oklahoma City • Web developer since 1999 (PHP3) • PHP, JavaScript, Ruby / Web & Mobile Friday, March 2, 2012
3. What is HMVC? Friday, March 2, 2012
4. Multiple MVC triads working together to compose a single HTTP Response for a single HTTP Request Friday, March 2, 2012
5. Multiple MVC Triads, Single Response http://techportal.ibuildings.com/2010/02/22/scaling-web-applications-with-hmvc/ Friday, March 2, 2012
6. Properties of HMVC • Many MVC triads working together • Separation of responsibilities of display • Modularization of content & display types Friday, March 2, 2012
7. HMVC is the “widgetization” and modularization of content Friday, March 2, 2012
8. Modular MVC Triads Friday, March 2, 2012
9. A quick note on HMVC... Friday, March 2, 2012
10. Most HMVC implementations are not actually Hierarchical Friday, March 2, 2012
11. A more useful term might be Nested MVC when no hierarchy is tracked or enforced Friday, March 2, 2012
12. Why HMVC? Friday, March 2, 2012
13. HMVC design promotes broader code re-use and separation of responsibilities though natural organization and dispatching of MVC triads Friday, March 2, 2012
14. Instead of using partials and shared template fragments, just pass the responsibility to another MVC triad Friday, March 2, 2012
15. <Thing> should know how to render <Thing> Friday, March 2, 2012
16. Benefits of HMVC • Shift the responsibility of the display and logic down to a self-contained MVC structure • Eliminate repetitive code in controllers passing data to templates and templates passing data to and rendering partials • Call directly in view where needed for display • Built-in widget-like structures • Keep extra business logic contained inside module that deals with it Friday, March 2, 2012
17. How do I use HMVC? Friday, March 2, 2012
18. Anywhere you would use a widget or related but separate content type on a page Friday, March 2, 2012
19. Any Shared Content Type • Comments • Tags / Tag Clouds • Ratings • Shopping Cart Contents • Menus • RSS/Blog Feeds • Calendars • (etc...) Friday, March 2, 2012
20. How about some Code? Friday, March 2, 2012
21. Modular MVC Triads Friday, March 2, 2012
22. Alloy HMVC Example Friday, March 2, 2012
23. Kohana 3.0 HMVC Example Friday, March 2, 2012
24. Symfony 2 HMVC Example Friday, March 2, 2012
25. Demo Code! Friday, March 2, 2012
26. hello@brightb.it http://brightb.it (405) 595-0011 Oklahoma City Friday, March 2, 2012